If you were stranded on a desert island what two items you would take with you and why?

 If I were stranded on an island and had to bring only two items with me to survive. I do a lot of hiking and overnight camping, so for me, it is easy. A life straw and my Esee knife. The life straw so I can have fresh filtered water to stay hydrated and my outdoor survival knife. On my knife's spine, it has a 90-degree angle to strike a piece of flint or farro rod (if it is available) to produce a flame. Also, it is an excellent tool for hunting and protection.